Traveling-grate stoker



L. W. KLEIN TRAVELING' GRTE STOKER Filed Jan. 2'5, 1925 ...lxllll llllJ lllvlHIIHIIIHHHHHH lllllllIHHIIHIHIIIIHIL Patented Nov. A(i, 1928;

UNITED STATES PATE nr certes.

LOUIS WILLIAM KLEIN, OF CHICAGO, ILIJIIIGIS, AECIGNB, T0 INTERFITII'T L 013M- BUSTION ENGINEERING- CORERATTOE, CF NEW YGBK, Il. Y. A CCREORATIN C't?` DELAWARE;

rRAvnLIne-GRATE sroxnn.

Application filed Januaryk 27,v 1925. Serial No. 4,991.

My invention relates to stokers, and has special reference to chain tgrateA stokers of the type in which the upper runof the irate rides upon a support-ingl structure compil a plurality of beams arranged between l extending tansversely of the runs of the grate and supported at their ends by the side walls of the furnace. The i v beams cooperate with otherparts of the struc to form a plurality oftranszf'ersely extending compartmentsfor receiving;l ashes and other siftings from'the grate and for supplying air to the fuel bed, the several conipartments being in communication with separate sources ofcompressed air supply. yI-Ieretofore, par

ticularly'in the case of relativelywide chain grate stokers, considerable diiliculty has been experienced with the beams sagging at their centerswhich is due to the weight of the upper run of the grate and thematerial supported thereon7 and also to the heat of the burning fuel particularly when the fire is banked. Such sagging of the beams is objectionable as it results in an unevenness of the fuel bed, and injury to the grate, and causes gaps between the chain grate and the supporting structure which destroys the air seal between the several compartments.

An object of the .present invention is to provide a traveling grate stoker of the character indicated in which there is provision of means for obviating the Yobjectionable feature of the prior construction above de-y scribed.

Another object of the invention is to provide a novel and improved traveling grate stoker.

The several features of the invention7 whereby the above mentioned and other objects may be attained, will be clearly understood from the following` description and accompanying drawings, in which: s

Figure 1 is a longitudinal sectional view, partly shown diagrammatically of a chain grate stokerembodying the features of the invention in their preferred form, the section beingtaken substantially on the line 1-1 of Fig. 2; and f Fig. 2 is a transverse sectional view taken substantially on the line 2 2 of Fig. 1.

The Stoker illustrated in the drawings is provided With an endless chain grate 2 which turev passes over a sprocket wheel 4i and a drum G arranged at the front andrear ends thereof andinounted `on shafts 8 which extend between the longitudinal side walls 10 of 'the striker. rPhe stoker :is vfuitlier provided witha rsupporting,l structureupon which the upper run ofthe `grate rides and which is` arranged between and extends*transversely ot the upper and lower runs of the grate.

This supporting structure is provided with` a. plurality of transversely extending` compartments for receiving; ashes and other siftings from the upper run ofthe `grate and for vsupplyingi air underpressure to the fuel bed, the air supply to the different compartments being independently controlled. As shown,

this structure comprises aplu'rality of transversely extending` I-beams 12 which extend between and are supported by the longitudinal side walls of the stoker. A plurality of longitudinally,extending; rails 14 upon which the upper run of the grate rides are supported upon the I-beams, and sealing plates or bars 15 are also mounted upon the I-beams and extend between the rails. The ash receivingl and air supplying compartments are each formed by walls 16 that are arranged transversely in .V-form and have their upper edges secured to the upper portions of the I- beams of each' pair7 any suitablemeans being provided for removing the ashes accumulating in each compartment and for supplying -l air under pressure to the compartments independently of each other. The parts above described are of a well known construction.y

In the illustrated construction means is provided for obviating` any danger of the I-beams sagging' under the weight of the upper run of the grate and the material sup ported thereon. To provide for this the severalY I-beams 12 arecentrally supported by a heavy I-beam 18 which extends centrally of the grate and is mounted upon'suitably ar ranged cement pillars 20. The I-beams 12 are rigidly secured on the beam 18 as by bolts 19. In order that the I-beam 18 shall not interfere with the chain grate7 the latter is divided longitudinally into two sections,

ranged at opposite sides of the central web of the I-beam 1S so as to clear it. In order to prevent coal and ashes from working down lil() 'the lower runsof the two sections being are its supportingv pillars provide a iirni and` rigid su pport for the Center of the transverse Lboains i2, and that as the parts are bolted together the benin acte as a stili/ener 'for the whole supliorting et ueture As will be evident art, niy irwention peri'nite various inodilieations without departing 'from the spirit thereof or the scope of the appended Claims.

TvVha-t l claiin is:

1. A. Stoker of the deseribed having, in combination, an endlees travelinggrate divided longitudinally into two sections arranged Side by side and spaced a Slight distance apart So to forni a vfuel Supporting and propelling` surfe-ee substantially continuous throughout its width, a supporting structure to prevent sagging or the upper run of the grate arranged between the upper and lower runs of the grate and over which the upper run passes, an -beain extending longitudinally of the grate with its web extending through the-space between the lower rune of to those Skilled in the' said sections: and upon which Ysaid Supportingl structure is mounted, ineans ior Closing,T the spaee between the upper runs o said sections throughout. euosttntially the length thereof, and pillars upon which said -beuin is mounted, the space between said sections being only suiiicient `to pei-init the sections to clear tbe veb of the-beain. y

2. A stolzer of the Claes 4described having, in combination, an endless traveling4 grate divided longitudinally into eeetir d eide by Side and epeoed a 5"' so aS to torni e 'fuel supportii D o surface substantially continuous ti' its width, a Supporting structure te prevent sagging of the upper run of the grate ranged between the upper and lower rune ol" the grate and over which the upper run penses,

an l-beain extending longitudinally of the grate with its-web extendingl through space between the lower rune oi said eeetioi'is und upon which Vsaid supporting; structure is mounted, and at strip removably mounted upon Said supporting,` structure und substantially closing` the space between the upper rune of said sections throughout substantially the length thereof and havingl its top surface in substantially the plaine or' the top surface ot the grate. v

ln testimony whereof, l' have signed niy naine to this epeoiiieation this 23rd day ot' January, 1925. Y

LOUIS VVILLIAl/ KLEN.V

the 

